PA 《略》 【米郵便】 Pennsylvania (州); Pan American World Airways passenger agent 旅客係; personal appearance; personal assistant; physician's assistant; post adjutant 守備隊[衛戍(_えいじゅ)]副官; 1940 【電気】 power amplifier; 1936 press agent; 1915 Press Association; Press Attach; product analysis; prosecuting attorney; 【カトリック】 protonotary apostolic; public address (system); publicity agent; Publishers Association; purchasing agent 購買係.